KR20130110120A - Light diffusive ink composition and light guide panel unit using the same - Google Patents

Abstract

PURPOSE: A light diffusive ink composition makes emotional and aesthetic light by changing light from a light source into a crystal photopattern, thereby obtaining beautifully designed illumination. CONSTITUTION: A light diffusive ink composition outputting a crystal photopattern comprises an ink binder which includes one of an epoxy resin and a polyamide resin and cures the light diffusive ink composition by being mixed with the other; a polymethylmethacrylate particle for obtaining the crystal photopattern; and an ink solvent. A light guiding panel (110) includes a light diffusive ink layer formed by the light diffusive ink composition; and a light guiding element (111) having a light-guiding ink layer.

Description

Light Diffusive Ink Composition And Light Guide Panel Unit Using The Same

The present invention relates to a light diffusion ink composition, and more particularly, an ink composition applied to a light guide panel made of glass to form a light diffusion layer with respect to light emitted from a light source, and a glass capable of displaying a display image implemented using the same. A light guide panel and a display unit are made of material.

In general, the light guide panel is an illumination component for emitting light in the form of a surface light source having a uniform brightness by receiving light from a light source, and is applied as a component for implementing a backlight unit (BLU) of a liquid crystal display (LCD).

1 and 2, the surface of the light guiding member 4 used for manufacturing the light guiding panel, for example, a light guide plate or a light guiding film made of plastic or glass, is cut by using a laser processing technique. When a pattern (8) consisting of scratches or dots is formed on a surface of the light guide panel, the light guide panel is formed by scattering, refracting, or reflecting light of the light source 3. Illumination light is emitted in the form of a light source.

However, the light guide panel manufactured by the laser processing technology emits light from the light source 3 as a surface light source of the same color as that of the light source 3, so that it is difficult to transmit aesthetic illumination light and form a monotonous surface light source. It just stops emitting light.

On the other hand, in recent years, light diffusion ink is printed on the light guide member 4 to form the pattern 8 in the form of dots on the surface of the light guide member 4 to scatter / reflect the light emitted from the light source 3. A light guiding panel has been developed. The light guiding panel using the light diffusing ink also outputs the light having the same color and uniform brightness by scattering / reflecting light from the light source. Although it does not output beautiful light or images of a specific design by itself, although the light diffusion ink improves the overall brightness, there is a limit in applying the light guide panel to various fields other than the backlight unit.

In other words, the conventional light guide panel, more specifically, the light guide member 4 evenly illuminates the substrate of the liquid crystal display, or an image sheet 2 (eg, an advertisement) in which a certain shape of the image 2a is implemented. B) a backlight unit disposed at the rear of the photo sheet or picture sheet for decoration, and illuminating the image sheet 2 from the rear by illuminating a specific portion of the image sheet 2 in the same color as the light of the light source 3. This only applies to the situation.

Accordingly, the present inventors convert a light into a light diffusion ink composition capable of emitting light in aesthetic and emotional form, a light guide panel using the same, and a light pattern image in which an image is implemented as a light diffusion ink in the light guide panel itself. Output light guide panel was developed.

Publication No. 10-2006-0056534, published May 25, 2006

The present invention has been made to solve the above-described problems, an object of the present invention is to provide a light-diffusing ink composition and a light guide panel using the same that can give an aesthetic feeling by outputting a light pattern of the crystal form.

Another object of the present invention is a light guide panel capable of outputting a display image printed by a light diffusing ink composition according to a predetermined design, that is, a light guide capable of outputting a display image by itself rather than a type of illuminating an image sheet from behind. To provide a panel.

Still another object of the present invention is to provide a light diffusion ink composition capable of realizing a display image of various colors or shapes on the light guide panel, and a light guide panel capable of outputting a color image implemented thereby.

In order to achieve the above object, the present invention provides a light diffusion ink composition for receiving a light of a light source and outputting a crystal light pattern; An ink binder for curing the light diffusing ink composition by mixing any one of an epoxy resin and a polyamide resin; PMMA (Polymethylmethacrylte) particles for the realization of the crystal light pattern; And it provides the light-diffusion ink composition containing an ink solvent.

Here, the PMMA particles are characterized in that the PMMA beads (Bead) having an average particle size of 10㎛ ~ 50㎛. More specifically, the PMMA beads are characterized in that the average particle size is 15㎛ ~ 20㎛.

The refractive index of the ink binder including the mixture of the epoxy resin and the polyamide resin is 1.52, the PMMA particles are characterized in that the refractive index is 1.49.

The ink solvent may be at least one selected from the group consisting of ketones, esters, ethers, hydrocarbon-based, and glycol ether-based organic solvents.

110 to 250 parts by weight of the ink binder and 50 to 150 parts by weight of the ink solvent are mixed with respect to 100 parts by weight of the PMMA particles.

The ink binder determines a mixed content of the epoxy resin and the polyamide resin in an equivalent ratio, and for example, AHEW (Amine Hydrogen) based on 100 parts by weight of an epoxy resin having an EEW (Epoxide Equivalent Weight) = 200 (g / eq) value. 12 parts by weight of a polyamide resin having an Equivalent Weight) = 24 (g / eq) value is mixed.

It may be configured to further include a color pigment for implementing the light-diffusing ink composition color according to the present invention. The color pigment is characterized in that the transparent color pigments.

The color pigments; Azo pigments, Phthalocyanine pigments, Anthraquinone pigments, Thioindigo pigments, Perinone® pigments, Perylene pigments, Quinacridone pigments, and transparency Characterized in that at least one selected from the group consisting of color pigments.

As said azo pigment, it is C.I. Pigment Red 3, 5, 48: 1, 48: 2,48: 3, 48: 4, 53: 1, 53: 2, 57: 1, hour. children. Pigment Yellow 1, 3, 83, C.I. Pigment orange 16, 13, and the like; The phthalocyanine pigment may be ci. Pigment Blue 15, 15: 3, 17 and C.I. Pigment Green 7 and the like.

And examples of the anthraquinone pigments are condensed polycyclic organic pigments indanthrene blue C.I. Pigment Blue 60 (Indanthrene Blue C. I. Pigment Blue 60); Examples of the thioindigo pigments include thioindigo magenta C. eye. Pigment bylot 38 (Thioindigo Magenta C.I. Pigment Vilot 38); Examples of the perinone pigments include perinone orange C.I. Pigment Orange 43 (Perinone Orange C. I. Pigment Orange 43).

Examples of the perylene-based pigments are perylene maroon C. eye. Pigment Red 179 (Perylene Maroon C. I. Pigment Red 179); Examples of the quinacridone pigments include quinacridone red C. eye. Pigment violet 19 (Quninacridone Red C.I. Pigment Violet 19); Examples of the transparent color pigments, S.I. Pigment Red 177 (C.I. Pigment R 177 (red)) and C.I. Pigment green 36 (CI Pigment G36 (green)) and C.I. Pigment Blue 15: 6 (C.I. pigment B15: 6 (blue)) and C.I. Pigment Y139 (yellow) and C.I. Pigment violet 23 (CI Pigment V23 (violet)).

Here, the color pigment is 5 to 50 parts by weight based on 100 parts by weight of the PMMA particles.

In another aspect the present invention provides A light diffusion ink layer formed on the light diffusion ink composition having the above-described configuration; And a light guiding member made of glass provided with the light diffusion ink layer.

The light guiding member has an image in which the light diffusing ink composition is printed on a surface of the light guide panel according to a predetermined design so that the light diffusing ink layer is formed on the surface of the light guiding member; As the light of the light source is emitted to the light guide member, an image of the crystal light pattern is output to the front of the light guide member.

According to the light diffusing ink composition and the light guide panel and the display unit using the same according to the present invention, the following effects are obtained.

According to the present invention, since the light of the light source is converted into a crystal light pattern and outputted, aesthetic and emotional light can be realized, and the light of the light guide panel using the light can be realized in a beautiful design.

According to the present invention, the colored light diffusing ink composition may implement a colored crystal pattern and a mixed color together with the color of the light source, thereby outputting crystal light patterns of various colors.

According to the present invention, the light diffusion ink composition may form a light diffusion layer on the light guide panel and simultaneously implement a display image having a desired design on the light guide panel itself by using a colored and / or colorless light diffusion ink composition. The panel itself can directly output display images of aesthetic and beautiful designs in crystal light patterns.

According to the present invention, it is possible to manufacture a display panel such as a decorative plate, a signboard, an advertisement board, etc., in which an image of a predetermined design is implemented without stacking a separate image sheet in front of the light guide panel, thereby reducing the number of parts, thickness, and weight. A decorative image or an advertisement image of a predetermined design applied to the light guide panel, for example, a picture or a logo and the like, may be aesthetically output in a colored and / or colorless design by receiving light.

1 is an exploded perspective view showing an example of a conventional display unit.
2 is a cross-sectional view illustrating a backlight unit included in the display unit of FIG. 1.
3 is an exploded perspective view showing an embodiment of a display unit having a light emitting image implemented by the light diffusing ink composition according to the present invention.
4 is a schematic cross-sectional view of the display unit of FIG. 3.

Hereinafter, a preferred embodiment of the light diffusion ink composition according to the present invention will be described in more detail.

One embodiment of the light diffusion ink composition according to the present invention comprises an ink binder (Ink Binder), a light diffusing agent and an ink solvent. Here, the light diffusion ink composition may further include an additive.

The ink binder is implemented by mixing an epoxy resin and a polyamide resin. In other words, the ink binder comprises any one of an epoxy resin and a polyamide resin and cures the light diffusion ink composition by mixing with the other.

Thus, the ink binder finally comprises a mixture of the epoxy resin and the polyamide resin, wherein the polyamide resin is mixed with the epoxy resin so that the light diffusion ink composition according to the present invention naturally Cures.

Therefore, the polyamide resin is kept separate from each other separately from the epoxy resin and mixed immediately before use of the light diffusing ink composition according to the present invention to constitute the ink composition. That is, the ink binder of the light-diffusion ink composition according to the present invention is a two-component type.

Next, the ink solvent may be at least one selected from the group consisting of ketones, esters, ethers, hydrocarbon-based and glycol ether-based organic solvents. Examples of the ketone solvents include isophorone and cyclohexanone, and examples of the ester solvents include butyl kebitol acetate and ethyl ketitol acetate. Examples of the ether solvents include butyl ketitol and ethyl kebitol.

The hydrocarbon solvents include aromatic 150 and aromatic 200, and the glycol ether solvents include butyl cellusolve and ethyl cellusolve. .

One or two or more kinds of the above-mentioned ketones, esters, ethers, hydrocarbon-based, and glycol ether-based organic solvents may be mixed to constitute the ink solvent.

The light diffusing agent may be composed of PMMA (Polymethylmethacrylate) particles, in particular PMMA beads, and is applied to a mixture of the ink binder and the ink solvent to form a crystal light pattern, for example, crystal glass. Implement the same sense of sensuality.

In more detail, the PMMA particles may be composed of PMMA beads having an average grain size (Grain Size) of 10 ㎛ ~ 50 ㎛ for implementing the crystal light pattern, more preferably the PMMA beads An average particle size of 13 µm to 30 µm, particularly 15 µm to 20 µm, is good for the output of the crystal optical pattern.

For the light diffusion using ink, the average particle size of the PMMA beads may be smaller than 10 μm, but in this case, the haze value is lowered to monotonously emit light of the light source, and it is difficult to realize a crystal light pattern. Or the crystal light pattern output is weak.

In more detail, the light diffusion ink composition is screen printed on the light guiding member (see number 111 in FIG. 3) and dried to form a light diffusion layer on the light guiding member, where the average particle size of the PMMA beads is smaller than 10 μm. In the PMMA beads are impregnated in the ink binder, the light diffusion effect is lowered. That is, haze appears low. However, when the average particle size of the PMMA beads is larger than 10 μm, the light diffusion layer, that is, the printing surface is ruggedly expressed, so that irregularities (embossing) are formed on the glass, so that the crystal light pattern may be output by refracting the light of the light source. have.

In addition, the average particle size of the PMMA beads may be greater than 50 μm, in which case screen mesh ink omission is reduced. Preferably, the PMMA beads have an average particle size of 15 μm to 20 μm in terms of screen mesh omission and haze due to particle overlap.

The ink binder is a mixture of an epoxy resin and a polyamide resin so that the refractive index is approximately 1.52, and the ink binder and the PMMA particles are the same or similar in the refractive index is effective in the implementation of the crystal optical pattern. In the present embodiment, the refractive index of the PMMA particles is 1.49, and the ink binder includes a mixture of an epoxy resin and a polyamide resin having a refractive index of 1.52.

The light diffusing agent is substantially the same refractive index as the ink binder is effective in the implementation of the crystal optical pattern, spherical beads having a high refractive index, such as polybutylmethacrylate (PBMA) beads, in particular instead of the PMMA beads, especially light having the same refractive index as the ink binder Diffusing agents may also be used.

With respect to 100 parts by weight of the PMMA particles, the ink binder is 100 to 300 parts by weight, in particular 110 to 250 parts by weight, the ink solvent 30 to 200 parts by weight, in particular 50 to 150 parts by weight is mixed, out of this range If the amount of the PMMA particles is excessive, the total light transmittance decreases due to the superposition of the PMMA particles, and the light diffusing effect is lowered even if the amount is insufficient.

Meanwhile, based on 100 parts by weight of the ink solvent, 130 to 250 parts by weight of an ink binder, that is, 130 to 250 parts by weight of the mixture of the epoxy resin and the polyamide resin, is applied as an ink binder with respect to 100 parts by weight of the ink solvent. It is not limited.

Curing of the ink in which the epoxy resin and the polyamide resin are mixed and the mixture is applied as an ink binder is known in the ink art, but in the present invention, more specifically, the epoxy resin and the polyamide resin are mixed in the ink binder. As an example of determining the ratio, a method of mixing an epoxy resin and a polyamide resin using an equivalent ratio is disclosed.

For example, 12 parts by weight of polyamide resin having a value of Amine Hydrogen Equivalent Weight (AHEW) = 24 (g / eq) relative to 100 parts by weight of an epoxy resin having an EEW (Epoxide Equivalent Weight) = 200 (g / eq) value It may be mixed, but is not limited thereto, and may be mixed with each other in a range of ratio experimentally.

At this time, when the epoxy resin is mixed with the polyamide resin as described above, after a predetermined time has elapsed, it is preferable to mix and use during the screen printing operation of the light diffusion ink composition.

For example, after the light diffusion ink composition is prepared without any one of the epoxy resin and the polyamide resin, the light diffusion ink of the epoxy resin and the polyamide resin is immediately before the screen printing operation of the light diffusion ink composition. The light diffusion ink composition according to the present invention may be prepared by finally mixing materials not included in the composition, and screen printing may be performed using the final light diffusion ink composition.

It may be configured to further include a color pigment for implementing the light-diffusing ink composition color according to the present invention. As the color pigment, a transparent color pigment is used.

As said color pigment; Azo pigments, Phthalocyanine pigments, Anthraquinone pigments, Thioindigo pigments, Perinone® pigments, Perylene pigments, Quinacridone pigments, and transparency Color pigments, and the like, and the light diffusion ink composition may include any one or more of these color pigments.

As said azo pigment, it is C.I. Pigment Red 3, 5, 48: 1, 48: 2,48: 3, 48: 4, 53: 1, 53: 2, 57: 1, hour. children. Pigment Yellow 1, 3, 83, C.I. Pigment orange 16, 13, and the like; The phthalocyanine pigment may be ci. Pigment Blue 15, 15: 3, 17 and C.I. Pigment Green 7 and the like.

And examples of the anthraquinone pigments are condensed polycyclic organic pigments indanthrene blue C.I. Pigment Blue 60 (Indanthrene Blue C. I. Pigment Blue 60); Examples of the thioindigo pigments include thioindigo magenta C. eye. Pigment bylot 38 (Thioindigo Magenta C.I. Pigment Vilot 38); Examples of the perinone pigments include perinone orange C.I. Pigment Orange 43 (Perinone Orange C. I. Pigment Orange 43).

Examples of the perylene-based pigments are perylene maroon C. eye. Pigment Red 179 (Perylene Maroon C. I. Pigment Red 179); Examples of the quinacridone pigments include quinacridone red C. eye. Pigment violet 19 (Quninacridone Red C.I. Pigment Violet 19); Examples of the transparent color pigments, S.I. Pigment Red 177 (C.I. Pigment R 177 (red)) and C.I. Pigment green 36 (CI Pigment G36 (green)) and C.I. Pigment Blue 15: 6 (C.I. pigment B15: 6 (blue)) and C.I. Pigment Y139 (yellow) and C.I. Pigment violet 23 (CI Pigment V23 (violet)).

One or more of the above-described color pigments may be selected as the color pigments, and mixed colors may be implemented when color pigments of different colors are mixed among the color pigments described above.

Here, the color pigment is 5 to 50 parts by weight of the color pigment is mixed with respect to 100 parts by weight of the PMMA particles. More specifically, the color pigment is mixed with 15 to 40 parts by weight based on 100 parts by weight of the PMMA particles. Conventionally, although the color of light emitted from the light guide panel depends only on the color of the light source, the color pigment is included in the light diffusion ink composition according to the present invention, so that the light guide panel may emit light of various colors.

In addition, various display images, such as a person, an object, and a logo, may be implemented on the surface of the light guide panel, more specifically, on the surface of the light guide member by using a colored and / or colorless light diffusion ink composition, and the light guide panel may be implemented. As the light of the light source is illuminated on the light guide panel, the light guide panel can directly output the image as a crystal light pattern, thereby improving aesthetics and design, and omitting a conventional image sheet, thereby simplifying components and transparent light guide members. As a result, it is possible to implement display devices for devices and other objects, such as advertisements, signs, and decorations, which are clearly and clearly expressed.

3 and 4, the display unit includes the light guide panel 110 and the light source 120, and the light guide panel 110 includes the light guide member 111 and the light diffusion layer 112. It is configured to include. The light diffusion layer 112 receives the light of the light source 120 and outputs a display image 112a of the crystal light pattern to the front of the light guide panel 110.

In other words, the light guide panel 110 has the display image 112a of the predetermined design emitted by the light source 120, and the light diffusion ink composition is adapted to the design of the display image 112a. The display image 112a may be embodied in a crystal light pattern, that is, a crystal feel by printing the surface of the 111, more specifically, the back surface of the light guide member to form the light diffusion layer 112.

Therefore, the light diffusion layer 112 may be integrally formed on the surface of the light guide member 111 in the shape of the design of the display image. In this case, the appearance of the light diffusion layer 112 and the appearance of the display image 112a may be reduced. The appearance is the same. Furthermore, the display image 112a may be implemented as a color image. The light diffusion ink composition printed on a portion of the display image 112a that is implemented with color includes the color pigment. Therefore, the light diffusion layer of the light guide panel according to the present invention may implement a color display image of a single color or multicolor. Of course, only a part of the display image may be composed of a light diffusing layer printed by the light diffusing ink composition according to the present invention.

The display image 112a may include a logo, an advertisement, a photograph, a pattern, a mark, a character, a symbol, and the like, and the light diffusion ink composition is printed on a surface of the light guide member 111 according to a predetermined design. The light diffusion layer 112 formed according to the design on the surface of the light guide member 111 by printing of the light diffusion ink composition has a shape such as the logo or advertisement, a photograph, a pattern, a mark, a character, a symbol, or the like.

In more detail, in the present invention, the display image 112a is a material of light diffusion ink, and the light diffusion ink composition is coated on the surface of the light guide member 111 (for example, by silk screen printing). Printing) to form the light diffusing layer 112, and the light diffusing layer 112 scatters / reflects / refracts the light of the light source 120 and converts the light to the front of the light guide panel 110. ) Is emitted as a crystal surface light source.

The light source 120 may be applied to a white LED and / or a color LED in consideration of power consumption, a plurality of light emitting lamps 121, that is, the LED is disposed along the side edge of the light guide panel 110 to provide the illumination light. The light emitting lamps 121 may be configured to emit light simultaneously, sequentially or alternately. In addition, a mixed color may be implemented by mixing the light of the light source 120 and the color of the light diffusion layer 112.

In more detail, the illumination light of the light source 120 is incident through one side edge (incident part) of the light guide panel 110, and the illumination light emitted from the light source 120 passes through the light guide panel 110. The light diffusing layer 112 reaches the light diffusing layer 112 as it passes through, and the light diffusing layer 112 changes the direction of light emitted from the light source to emit the display image 112a in front of the light guide panel 110.

In this case, the light diffusing layer 112 of the light diffusing ink material converts light (illuminated light) of the light source transmitted through the light guide member 110 into a surface light source through a process such as scattering / reflection / refraction, and the light diffusing layer Since 112 is printed on the light guide member 111 according to a predetermined design of the display image, the display image 125 is emitted in a crystal light pattern in front of the light guide panel 110.

In conclusion, according to the present invention, the illumination light emitted from the light source 120 is converted into the display image 125 by the light diffusion layer 112 of the light guide panel 110 to be emitted in the form of a crystal light image.

According to the present invention, as the light of the light source 120 is illuminated on the light guide panel 110, the light guide panel can implement the display image in a crystal light pattern, thereby improving aesthetics and design, and improving the conventional image sheet. Since the parts can be omitted, the parts can be simplified and the transparent light guide member can be implemented to implement a display device for clean devices and other objects, for example, advertisements, signs, and decorations.

For example, when an image of a company logo, an advertisement, a person, or an object is printed on the surface of the light guide member 111 by the light diffusion ink composition according to a predetermined design, the light guide panel 110 may be Receiving the light of the light source 120 can implement a representation of the display image excellent in aesthetics.

Examples of the light guiding member include a plate made of plastic or glass, but in the present embodiment, the light diffusion ink composition according to the present invention is printed on a glass substrate or film by silk screen printing to obtain the light diffusion layer ( Light diffusion ink layer), and the light diffusion ink layer is printed according to an image of a predetermined design, that is, a predetermined design, thereby implementing a display panel such as an advertisement, a signboard, or a decoration.

The light diffusing layer 112 that implements the display image 112a may be divided into a plurality of parts and may be configured in different colors for each part, or may be illuminated by light sources of different colors.

Meanwhile, the light diffusion ink composition may include one or more additives such as an antifoaming agent, a dispersing agent, and a leveling agent. The additive includes but is not limited to 2 to 20 parts by weight, in particular 2.5 to 10 parts by weight based on 100 parts by weight of the PMMA beads.

Specific examples of the light-diffusion ink composition disclosed in this embodiment include PMMA beads having a mixture of epoxy resin and polyamide resin of 40 to 50% by weight, average particle size of 6 µm to 50 µm, particularly 15 µm to 20 µm. 20 to 35% by weight of light diffusing agent, 20 to 30% by weight of ink solvent containing one or more of ketones, esters, ethers, hydrocarbons and glycol ether solvents, 1-2% by weight of other additives, color pigments It may be prepared in 2 to 10% by weight.

Hereinafter, specific examples of the light diffusion ink composition according to the present invention will be described, and the following examples are merely illustrative of the present invention and are not limited to the following examples.

Preparation of Example 1 and Example 2

The light-diffusion ink composition according to Example 1 and Example 2 and the light-diffusion ink composition according to Comparative Example 1 and Comparative Example 2 were prepared according to the components and contents of [Table 1] as follows. A light guide panel was manufactured by printing on a glass light guide member (light guide plate) of 1 cm.

ingredient Example
One Example
2 Comparative Example
One Comparative Example
2 Remarks Epoxy resin 30 30 30 30 EEW (g / eq) 190-220 Polyamide resin 15 15 15 15 AHEW (g / eq) = 100-120 Isophorone 20 20 43 43 Ketone Solvent (boiling point 210 ℃) Butyl carbitol Acetate 10.6 10.6 10.6 10.6 Ester Solvent (boiling point 240 ℃) BYK-052 0.4 0.4 0.4 0.4 Silicone Defoamer
BYK of Germany G-410 0.5 0.5 0.5 0.5 Silicone Leveling Agent
Tego Products BYK-2008 0.5 0.5 0.5 0.5 Acrylic Dispersant
BYK's products in Germany PMMA bead (average particle size 15㎛) 23 PMMA bead (average particle size 20㎛) 23 PMMA bead (average particle size 2㎛) 23 Silicon bead
(Average particle size 2㎛) 23 Total 100 100 100 100

As described above, the mixing ratio of the polyamide resin mixed with the epoxy resin in the ink binder of the light diffusion ink composition can be freely determined as long as it can be mixed with the epoxy resin to cure the epoxy resin. For example, to cure 100 g of an epoxy resin having an EEW (Epoxide Equivalent Weight) = 200 (g / eq) value, Amine Hydrogen Equivalent Weight (AHEW) = 24 (g / eq) value 12 g of the polyamide resin is mixed, and in this embodiment, the epoxy resin of EEW (g / eq) = 190-220 and the high imidazole line of AHEW (g / eq) = 100-120 as shown in [Table 1]. A case of constituting an ink binder by mixing a high-imidazoline polyamide resin, wherein the epoxy resin and the polyamide resin are each of the total ratio of the light diffusion ink composition in consideration of the equivalent ratio. It may be mixed to have a content of 30% by weight and 15% by weight, but is not limited thereto.

And Examples 1 to 2 and Comparative Examples 1 to 2 by using a color difference meter and a haze meter (HAZE METER) to measure the L, a, b value and total light transmittance, and HAZE value are shown in [Table 2] below It was. The measured value of [Table 2] is the value before the light source is turned on, the crystal shape is exhibited after the light source is turned on when the total light transmittance is 40 or more, the L value is 50 or less and the HAZE value is 60 or more, more preferably, the whole The light transmittance is 50 or more, the L value is 40 or less, and the HAZE value is 75 or more.

division air
(Air) Example
One Example
2 Comparative Example
One Comparative Example
2 Remarks Viscosity (cps / 25 ℃)  - 7000 6500 7500 7300 Brookfield DV-I Viscometer color L 0.0 38.76 36.71 37.33 69.55 Glass LGP (1cm thick)
305 Mesh screen Print After drying
Measuring Equipment CM-2600D (Color Meter) Minolta a 0.0 0.15 0.14 0.16 -0.79 b 0.0 0.29 0.31 0.28 -1.87 Optical property Tt (full
Light transmittance) 100 89 88 90 86 Glass LGP (1cm thick)
305 Mesh screen Print After drying
Measuring Equipment HAZE Meter (SUGA, Japan) Haze 0.0 81 80 35 91.4

As described above, according to the present invention, the present invention can be embodied in other specific forms without departing from the spirit and scope of the present invention. It is obvious to them.

Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

110: light guide panel 111: light guide member (light guide plate)
112: light diffusion layer 112a: display image
120: light source

Claims (13)

A light diffusion ink composition which receives light from a light source and outputs a crystal light pattern;
An ink binder for curing the light diffusing ink composition by mixing any one of an epoxy resin and a polyamide resin;
PMMA (Polymethylmethacrylte) particles for the realization of the crystal light pattern; And
A light diffusing ink composition comprising an ink solvent. The method of claim 1,
The PMMA particles are light diffusion ink composition, characterized in that the PMMA beads (Bead) having an average particle size of 10㎛ ~ 50㎛. 3. The method of claim 2,
The PMMA beads are light diffusion ink composition, characterized in that the average particle size of 15㎛ ~ 20㎛. The method of claim 1,
The refractive index of the ink binder is 1.52, the light diffusion ink composition, characterized in that the PMMA particles have a refractive index of 1.49. The method of claim 1,
The ink solvent is a light diffusion ink composition, characterized in that at least one selected from the group consisting of ketones, esters, ethers, hydrocarbons and glycol ether organic solvents. The method of claim 1,
The ink binder is 110 to 250 parts by weight, and the ink solvent is 50 to 150 parts by weight based on 100 parts by weight of the PMMA particles. The method of claim 1,
The ink binder determines the mixed content of the epoxy resin and the polyamide resin in an equivalent ratio, but with respect to 100 parts by weight of epoxy resin having an EEW (Epoxide Equivalent Weight) = 200 (g / eq), Amine Hydrogen Equivalent 12) by weight of a polyamide resin having a Weight) value of 24 (g / eq) is mixed. The method of claim 1,
Light diffusion ink composition further comprising a color pigment for color implementation. 9. The method of claim 8,
The color pigment is a light diffusion ink composition, characterized in that the transparent pigment. 10. The method of claim 9,
The color pigments; Quinacridone Red C. I. Pignacridone Red CI Pigment Violet 19 and C.I. Pigment Red 177 (CI Pigment R 177 (red)) and C.I. Pigment green 36 (CI Pigment G36 (green)) and C.I. Pigment Blue 15: 6 (CI pigment B15: 6 (blue)) and C.I. Pigment yellow 139 (CI Pigment Y139 (yellow)) and C.I. Pigment violet 23 (CI Pigment V23 (violet)) Light diffusion ink composition, characterized in that at least one selected from the group consisting of. 11. The method according to any one of claims 8 to 10,
The color pigment with respect to 100 parts by weight of the PMMA particles light diffusion ink composition, characterized in that 5 to 50 parts by weight is mixed. A light diffusion ink layer formed by the light diffusion ink composition according to any one of claims 1 to 10; And
A light guide panel including a light guide member made of glass provided with the light diffusion ink layer. The method of claim 12,
The light guiding member has an image in which the light diffusing ink composition is printed on a surface of the light guiding member in accordance with a predetermined design so that the light diffusing ink layer is formed on the surface of the light guiding member; The light guide panel, characterized in that the image of the crystal light pattern is output to the front of the light guide member as the light of the light source is emitted to the light guide member.

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